What is the pH of 0.01 M glycine solution? For glycine ${\mathrm{K}}_{\mathrm{a}1 }= 4.5 \times {10}^{-3} \mathrm{and} {\mathrm{K}}_{\mathrm{a}2 }= 1.7 \times {10}^{-10 } \mathrm{at} 298\mathrm{K}$?

• 3

• 10

• 6.1

• 7.2

Of the following which change will shift the reaction towards the product?

${\mathrm{I}}_{2\left(\mathrm{g}\right)} \rightleftharpoons 2{\mathrm{I}}_{\left(\mathrm{g}\right),} ∆{\mathrm{H}}_{\mathrm{f}}^{°} \left(298\mathrm{K}\right) = +150\mathrm{kJ}$

• Increase in concentration of I

• Decrease in concentration of I₂

• Increase in temperature

• Increase in total pressure

Assertion : The free gaseous Cr atom has six unpaired electrons.

Reason: Half-filled s orbital has greater stability.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Nuclear binding energy per nucleon is in the order - ${}_4{}^9\mathrm{Be} >{}_3{}^7\mathrm{Li} >{}_2{}^4\mathrm{He}$

Reason : Binding energy per nucleon increases linearly with difference in number of neutrons and protons.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : All F- S -F angle in SF₄ is greater than 90° but less than 180°.

Reason : The lone pair-bond pair repulsion is weaker than bond pair-bond pair repulsion.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Assertion : Effusion rate of oxygen is smaller than nitrogen.

Reason: Molar mass of nitrogen is smaller than oxygen.

• If both assertion and reason are true and reason is the correct explanation of assertion

• If both assertion and reason are true but reason is not the correct explanation of assertion

• If assertion is true but reason is false

• If both assertion and reason are false.

Which of the following is only acidic nature?

• Be(OH)₂

• Mg(OH)₂

• B(OH)₃

• Al(OH)₃

Which of the following imparts green colour to the burner flame?

• B(OMe)₃

• Na(OMe)

• Al(OPr)₃

• Sn(OH)₂

19.

The strongest base among the following is

• 

• 

• 

• 

The compound having only primary hydrogen atoms is

• isobutene

• 2,3-dimethylbutene

• cyclohexane

• propyne