Chemistry Question and Answers

1. The oxidation state of oxygen in $O_{2}[PtF_{6}]$ is

Coordination Compounds

2. Which compound has planar structure?

AIRCH 2021

3. $2.5\, g$ of the carbonate of a metal was treated with $100 \,ml$ of $1 \,N H _{2} SO _{4}$. After the completion of the reaction, the solution was boiled off to expel $CO _{2}$ and was then titrated against $1 \,N\, NaOH$ solution. The volume of alkali that would be consumed, if the equivalent weight of the metal is $20$

AIIMS 2009 Some Basic Concepts of Chemistry

4. Aqueous solution of which of the following has highest $pH$ ?

AIRAR 2021

5. For the conversion given below, find the correct sequence of reagents needed.

Amines

6. In the reaction: $4Fe + 3O_2 \rightleftharpoons 4Fe^{3+} + 6O_2^{2-}$ which of the following statement is incorrect?

AIIMS 1998 Redox Reactions

7. Identify the transition element :

The d-and f-Block Elements

8. Which of the following will not displace hydrogen?

Punjab PMET 1999

9. An element with atomic number $26$ will be found in group :

Haryana PMT 1999

10. $HgCl _2$ is soluble in

The d-and f-Block Elements

11. Consider the following graph.

What could be the possible reason for a dip at boron $(B) $ in the above plot?

Classification of Elements and Periodicity in Properties

12. The alkyl halides that can be made by free radical halogenation of alkanes are

VMMC Medical 2008

13. Which of the following is a double base propellant?

CMC Medical 2011

14. Match the species in Column I with their properties in Column II

Column I Column II

A $SF _6$ 1 $\pi$ bonds are also present

B $O _3$ 2 $\sigma$ bonds are only present

C $BeH _2$ 3 Hypervalent

D $CO$ 4 Hypovalent

5 Linear

Column I	Column II
A	$SF _6$	1	$\pi$ bonds are also present
B	$O _3$	2	$\sigma$ bonds are only present
C	$BeH _2$	3	Hypervalent
D	$CO$	4	Hypovalent
		5	Linear

Chemical Bonding and Molecular Structure

15. Statement 1 : The alkali metals can form ionic hydrides which contain the hydride ion.
Statement 2 : The alkali metals have low electronegativity, their hydrides conduct electricity when fused and liberate hydrogen at the anode.

Hydrogen

16. The first four ionisation energy value of an element are $190, 580, 590 $ and $5960$ kcal. The number of valence electrons in the element is :

Classification of Elements and Periodicity in Properties

17. Which of the following is an example of non - biodegradable detergent?

Chemistry in Everyday Life

18. I. $XeOF _{4}$ has square pyramidal structure.
II. $XeF _{2}$ has linear structure.
Which of the above mentioned statements is/are true?
Choose the correct option.

The p-Block Elements - Part2

19. Statement 1 : The pKa of acetic acid is lower than that of phenol.
Statement 2 : Phenoxide ion is more resonance stabilized.

NEET 2022

20. What is the major product when is treated with sodium ethoxide ?

Haloalkanes and Haloarenes

21. Which of the following is called polyamide?

Jamia 2006

22. Ethyl acetate is obtained when methyl magnesium bromide reacts with

AMU 2008 Haloalkanes and Haloarenes

23. Which of the following statements best describes how a catalyst works?

Chemical Kinetics

24. The noble gas which shows abnormal behaviour in the liquid state is

The p-Block Elements - Part2

25. Water gas is

UP CPMT 2011 Hydrogen

26. Which of the following compounds shows optical isomerism ?

AIEEE 2005 Coordination Compounds

27. Chlorobenzene on heating with chloral in presence of conc. $H_2SO_4$ gives

UP CPMT 2010 Haloalkanes and Haloarenes

28. Which of the following explanation is correct about the given below reaction?
$Cr _2 O _7^{2-}+ H _2 O \rightarrow 2 CrO _4^{2-}+2 H ^{+}$

Maharashtra CET 2021

29. Alkyl iodide can be obtained from alcohol using one of the following reagents. Identify the reagents

Alcohols Phenols and Ethers

30. Mutarotation does not occur in

Biomolecules

Chemistry Questions

Chemistry Questions

1. The oxidation state of oxygen in $O_{2}[PtF_{6}]$ is

2. Which compound has planar structure?

4. Aqueous solution of which of the following has highest $pH$ ?

5. For the conversion given below, find the correct sequence of reagents needed.

6. In the reaction: $4Fe + 3O_2 \rightleftharpoons 4Fe^{3+} + 6O_2^{2-}$ which of the following statement is incorrect?

7. Identify the transition element :

8. Which of the following will not displace hydrogen?

9. An element with atomic number $26$ will be found in group :

10. $HgCl _2$ is soluble in

11. Consider the following graph.

What could be the possible reason for a dip at boron $(B) $ in the above plot?

12. The alkyl halides that can be made by free radical halogenation of alkanes are

13. Which of the following is a double base propellant?

14. Match the species in Column I with their properties in Column II

Column I Column II

A $SF _6$ 1 $\pi$ bonds are also present

B $O _3$ 2 $\sigma$ bonds are only present

C $BeH _2$ 3 Hypervalent

D $CO$ 4 Hypovalent

5 Linear

15. Statement 1 : The alkali metals can form ionic hydrides which contain the hydride ion.
Statement 2 : The alkali metals have low electronegativity, their hydrides conduct electricity when fused and liberate hydrogen at the anode.

16. The first four ionisation energy value of an element are $190, 580, 590 $ and $5960$ kcal. The number of valence electrons in the element is :

17. Which of the following is an example of non - biodegradable detergent?

18. I. $XeOF _{4}$ has square pyramidal structure.
II. $XeF _{2}$ has linear structure.
Which of the above mentioned statements is/are true?
Choose the correct option.

19. Statement 1 : The pKa of acetic acid is lower than that of phenol.
Statement 2 : Phenoxide ion is more resonance stabilized.

20. What is the major product when is treated with sodium ethoxide ?

21. Which of the following is called polyamide?

22. Ethyl acetate is obtained when methyl magnesium bromide reacts with

23. Which of the following statements best describes how a catalyst works?

24. The noble gas which shows abnormal behaviour in the liquid state is

25. Water gas is

26. Which of the following compounds shows optical isomerism ?

27. Chlorobenzene on heating with chloral in presence of conc. $H_2SO_4$ gives

28. Which of the following explanation is correct about the given below reaction?
$Cr _2 O _7^{2-}+ H _2 O \rightarrow 2 CrO _4^{2-}+2 H ^{+}$

29. Alkyl iodide can be obtained from alcohol using one of the following reagents. Identify the reagents

30. Mutarotation does not occur in

Chemistry Questions

Chemistry Questions

1. The oxidation state of oxygen in $O_{2}[PtF_{6}]$ is

2. Which compound has planar structure?

4. Aqueous solution of which of the following has highest $pH$ ?

5. For the conversion given below, find the correct sequence of reagents needed.

6. In the reaction: $4Fe + 3O_2 \rightleftharpoons 4Fe^{3+} + 6O_2^{2-}$ which of the following statement is incorrect?

7. Identify the transition element :

8. Which of the following will not displace hydrogen?

9. An element with atomic number $26$ will be found in group :

10. $HgCl _2$ is soluble in

11. Consider the following graph. What could be the possible reason for a dip at boron $(B) $ in the above plot?

12. The alkyl halides that can be made by free radical halogenation of alkanes are

13. Which of the following is a double base propellant?

14. Match the species in Column I with their properties in Column II Column I Column II A $SF _6$ 1 $\pi$ bonds are also present B $O _3$ 2 $\sigma$ bonds are only present C $BeH _2$ 3 Hypervalent D $CO$ 4 Hypovalent 5 Linear

15. Statement 1 : The alkali metals can form ionic hydrides which contain the hydride ion. Statement 2 : The alkali metals have low electronegativity, their hydrides conduct electricity when fused and liberate hydrogen at the anode.

16. The first four ionisation energy value of an element are $190, 580, 590 $ and $5960$ kcal. The number of valence electrons in the element is :

17. Which of the following is an example of non - biodegradable detergent?

18. I. $XeOF _{4}$ has square pyramidal structure. II. $XeF _{2}$ has linear structure. Which of the above mentioned statements is/are true? Choose the correct option.

19. Statement 1 : The pKa of acetic acid is lower than that of phenol. Statement 2 : Phenoxide ion is more resonance stabilized.

20. What is the major product when is treated with sodium ethoxide ?

21. Which of the following is called polyamide?

22. Ethyl acetate is obtained when methyl magnesium bromide reacts with

23. Which of the following statements best describes how a catalyst works?

24. The noble gas which shows abnormal behaviour in the liquid state is

25. Water gas is

26. Which of the following compounds shows optical isomerism ?

27. Chlorobenzene on heating with chloral in presence of conc. $H_2SO_4$ gives

28. Which of the following explanation is correct about the given below reaction? $Cr _2 O _7^{2-}+ H _2 O \rightarrow 2 CrO _4^{2-}+2 H ^{+}$

29. Alkyl iodide can be obtained from alcohol using one of the following reagents. Identify the reagents

30. Mutarotation does not occur in

11. Consider the following graph.

What could be the possible reason for a dip at boron $(B) $ in the above plot?

14. Match the species in Column I with their properties in Column II

Column I Column II

A $SF _6$ 1 $\pi$ bonds are also present

B $O _3$ 2 $\sigma$ bonds are only present

C $BeH _2$ 3 Hypervalent

D $CO$ 4 Hypovalent

5 Linear

15. Statement 1 : The alkali metals can form ionic hydrides which contain the hydride ion.
Statement 2 : The alkali metals have low electronegativity, their hydrides conduct electricity when fused and liberate hydrogen at the anode.

18. I. $XeOF _{4}$ has square pyramidal structure.
II. $XeF _{2}$ has linear structure.
Which of the above mentioned statements is/are true?
Choose the correct option.

19. Statement 1 : The pKa of acetic acid is lower than that of phenol.
Statement 2 : Phenoxide ion is more resonance stabilized.

28. Which of the following explanation is correct about the given below reaction?
$Cr _2 O _7^{2-}+ H _2 O \rightarrow 2 CrO _4^{2-}+2 H ^{+}$