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Chemistry Questions

Chemistry Questions

1. Which of the following shows highest magnetic moment?

AMU 1999

2. $C_6H_5CH_3 \xrightarrow{CrO_2Cl_2} Z$
In the given sequence $Z$ is

Manipal 2005 Aldehydes Ketones and Carboxylic Acids

3. Glycerol is oxidised by bismuth nitrate to produce:

BITSAT 2005

4. Depletion of ozone layer causes

Environmental Chemistry

5. The normality of mixture obtained by mixing $100\, mL$ of $0.2 \,M H _{2} SO _{4}+100\, mL$ of $0.2\, M\, NaOH$ is :

Bihar CECE 2004

6. Azeotropic mixture of two liquids has boiling point higher than either of them when it

CMC Medical 2015

7. The following conversion can be obtained by using

$ \underset{\text { (excess) }}{\mathrm{NH}_3} \stackrel{?}{\rightarrow} \mathrm{N}_2 \mathrm{H}_4 $

NTA Abhyas 2020 The p-Block Elements - Part2

8. Acetone forms oxime by the reaction with:

Rajasthan PMT 1998

9. Benzene is obtained by fractional distillation of

Hydrocarbons

10. In the reaction : $ {{H}_{2}}+{{I}_{2}}=2HI $ In a 2 L flask 0.4 moles of each $ {{H}_{2}} $ and $ {{I}_{2}} $ are taken. At equilibrium 0.5 moles of HI are formed. What will be the value of equilibrium constant $ {{K}_{c}} $ ?

WBJEE 2006

11. Consider the unit cell with crystallographic dimensions is $a=b\neq c, \, \alpha =\beta =\gamma =90^\circ $ , What is the name of this crystal system?

NTA Abhyas 2020

12. What is the end product in the following sequence of reactions?

Amines

13. Assertion : $LiCl$ is predominantly a covalent compound.
Reason : Electronegativity difference between $Li$ and $Cl$ is too small.

AIIMS 2019 Chemical Bonding and Molecular Structure

14. Products obtained in the given reactions are shown below.
image
The number of possible products for $x$ and $y$ are:

Aldehydes Ketones and Carboxylic Acids

15. Which of the following ions is the most resonance stabilised?

Organic Chemistry – Some Basic Principles and Techniques

16. The turbidity of a polymer solution measures:

Polymers

17. The addition of $K _2 CO _3(a q)$ to the following solutions is expected to produce a precipitate in every case but one. That one is

Some Basic Concepts of Chemistry

18. Oxidation state of middle carbon in carbon suboxide is

Redox Reactions

19. image $\xrightarrow{ H^{+} }$? Product is

Alcohols Phenols and Ethers

20. The true statement about the d and f block elements.

NTA Abhyas 2020

21. The oxidation state(s) of Cl in $CaOCl_2$ (bleaching powder) is/are:

Redox Reactions

22. Statement 1: Excessive use of chlorinated synthetic pesticides causes soil and water pollution.
Statement 2: Such pesticides are non-biodegradable

Environmental Chemistry

23. Assertion : An exothermic process which is nonspontaneous at high temperature may become spontaneous at low temperature.
Reason : Spontaneous process is an irreversible process and may be reversed by some external agency.

Thermodynamics

24. The acidic, basic and amphoteric oxides, respectivley, are

NTA Abhyas 2022

25. Which of the following compound gives red colour with ceric ammonium nitrate

NTA Abhyas 2020 Alcohols Phenols and Ethers

26. If pH of the solution is one, what weight of $HCl$ present in one litre of solution?

Equilibrium

27. Which of the following complexe is used in cencer treatment?

NTA Abhyas 2020 Chemistry in Everyday Life

28. image

Alcohols Phenols and Ethers

29. Assume that $2 \times 10^{-17} J$ of light energy is needed by the interior of the human eye to see an object. How many photons of yellow light with $\lambda=595.2\, nm$ are needed to generate this minimum energy?

Structure of Atom

30. At $25^{\circ} C$ and $730 \, mm$ pressure, $730\, mL$ of dry oxygen was collected. If the temperature is kept constant what volume will oxygen gas occupy at $760\, mm$ pressure?

States of Matter