HSC Science (Computer Science) 12th Standard Board Exam - Maharashtra State Board Question Bank Solutions for Chemistry

What is the action of hydrochloric acid on the \[\ce{NH3}\]?

What is the action of hydrochloric acid on \[\ce{Na2CO3}\]?

What is the action of hydrochloric acid on NH₃?

What is the action of hydrochloric acid on Na₂CO₃?

What is the action of hydrochloric acid on NH₃?

What is the action of hydrochloric acid on Na₂CO₃?

What is the action of hydrochloric acid on \[\ce{NH3}\]?

What is the action of hydrochloric acid on \[\ce{Na2CO3}\]?

What is the action of hydrochloric acid on \[\ce{NH3}\]?

What is the action of hydrochloric acid on \[\ce{Na2CO3}\]?

What is the action of hydrochloric acid on the following?

\[\ce{NH3}\]

What is the action of hydrochloric acid on the following? 

\[\ce{Na2CO3}\]

Define enthalpy of sublimation.

Calculate C-Cl bond enthalpy from following reaction:

CH₃Cl_(g) + Cl_2(g) → Ch₂Cl_2(g) + HCl_(g) ΔH° = -104KJ

If C-H, Cl-Cl and H-Cl bond enthalpies are 414, 243 and 431 KJ-Mol^-1 respectively.

Explain impurity defect in stainless steel with diagram

Identify the product ‘D’ in the following sequence of reactions:

\[\ce{H3C - CH2 - CH2 - Cl \underset{KOH}{\overset{Alc}{->}} 'B' \overset{HBr}{->} 'C' \underset{Elther}{\overset{Na}{->}}'D'}\]

On the basis of valence bond theory explain the nature of bonding in [CoF₆]³ ion.

For the reaction: Cl₂(g) → 2Cl(g), _______.

(A) ΔH is positive, ΔS is positive

(B) ΔH is positive, ΔS is negative

(C) ΔH is negative, ΔS is negative

(D) ΔH is negative, ΔS is positive

The amine which reacts with nitrous acid to give yellow oily compound is _______.

(A) ethylamine

(B) isopropylamine

(C) secondary butylamine

(D) dimethylamine

Identify ‘A’ and ‘B’ in the following reaction :

\[\ce{CH3 - CH = CH2 ->[HBr]'A' ->[alc.KOH]'B'}\]