Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 39

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Earn 100

${CCl}_{4}$ is inert towards hydrolysis but ${SiCl}_{4}$ is readily hydrolysed because

50% studentsanswered this correctly

Important Questions on p-Block Elements (Boron & Carbon Family)

EASY

KVPY Aptitude Test - Stream SA

IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 40

A colourless gas which burns with blue flame and reduces

CuO

to

Cu

is:

EASY

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 41

When steam is passed through red hot coke:

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 42

Which of the following compound is obtained on heating potassium ferrocyanide with concentrated

H_{2} {SO}_{4}

?

MEDIUM

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 43

What will happen if boron trifluoride is kept in moist air?

EASY

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 44

Assertion: ${PbO}_{2}$ is an oxidising agent and reduced to $PbO$ .

Reason: Stability of $Pb (II) > Pb (IV)$ on account of inert pair effect.

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 45

Al

and

Ga

are trivalent in their compounds but monovalent compounds are the most stable down the

13 th

group. Why?

HARD

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Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 46

If you have a mixture of

CO

and

{CO}_{2}

, how would you know about the relative proportions of the two gases in the given mixture?

HARD

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IMPORTANT

Practice Book for KVPY Aptitude Test - Stream SA Chemistry>Chapter 10 - p-Block Elements (Boron & Carbon Family)>EXERCISE>Q 47

What happens when: (write only chemical reactions)

(a) iodine is treated with ${SnCl}_{2}$ .

(b) carbon dioxide is passed through a concentrated aqueous solution of sodium chloride saturated with ammonia.

(c) red lead is treated with nitric acid.

(d) dilute nitric acid is slowly reacted with tin.