Which of the following is correctly matched?

1) C - C bond length --- >0.077nm
2) Ionic radius of Na+ ---> 0.136 nm
3) C - Cl bond length --- >0.176 nm
4) Ionic radius of F- --- >0.095 nm

A formula of a compound, which gives simple whole number atomic ratio in one molecule of a compound, is called

1)  Diastereoisomerism

2)  Geometry isomerism

3)  Keto-enol isomerism

4)  Enantisomerism

Hexane and 3-methylpentane are examples of:

1) enantiomers

2) stereoisomers

3) diastereomers

4) none of these

The order of ease of oxidation of the ions F⁻, OH−, Br⁻ ,$${SO}_{4}^{2-}$$ is:

1) $${SO}_{4}^{2-}<{Br}^{-}<{OH}^{-}< {F}^{-}$$ 
2) $${SO}_{4}^{2-}> {F}^{-}> {Br}^{-}> {OH}^{-}$$
3) $${SO}_{4}^{2-}< {F}^{-}< {Br}^{-}< {OH}^{-}$$
4) $${OH}^{-}< {Br}^{-}< {F}^{-}< {SO}_{4}^{2-}$$

Ethyl alcohol reacts at a faster rate with HI than with HCl in forming the corresponding ethyl halides under identical conditions mainly because:

1) HI, being a stronger acid, protonates ethyl alcohol at oxygen much better and helps substitution.
2) the bond length in HI is much shorter than that in HCl.
3) I− is a much better leaving group
4) I− is a much better nucleophile than Cl−

When the temperature of an ideal gas is increased from 27⁰C to 927⁰C, the kinetic
energy will be:

 1) same
2) eight times
3) four times
4) twice

STATEMENT-1 : Silver extraction is done by dissolving its ore into cyanide solution.
STATEMENT-2 : In cyanide process, the silver is precipitated from soluble complex of silver of zinc-dust.

1) STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1
2) STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1
3) STATEMENT-1 is True, STATEMENT-2 is False
4) STATEMENT-1 is False, STATEMENT-2 is True

1 grams of a sample ⁴²K remained unchanged after 6262 hours. What was the original mass of the sample 4⁴²K, if the half life is 12.4 hours?

1) 64 grams
2) 32 grams
3) 8 grams
4) 16 grams

On the basis of Le Chatellier principle, predict which of the following conditions would be unfavorable for the formation of SO3? Given that
2SO2 + O2 ↔ 2SO3 ; ΔH=-42 kcal 

1) Low pressure
2) High pressure
3)high temperature
4)high concentration of SO2

Clemmensen reduction of a ketone is carried out in the presence of which of the following reagent?

1) $$Zn-Hg$$ with $$HCl$$
2) $$LiAl{H}_{4}$$
3) $${H}_{2}$$ and $$Pt$$ as catalyst
4) Glycol with $$KOH$$