ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 11

HARD

11th ICSE

IMPORTANT

Earn 100

How $d_{xy}$ and $d_{x^{2} - y^{2}}$ orbitals are related?

Important Questions on Sample Question Paper 5

HARD

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 11

Nickel (

Ni

) atom can lose two electrons to give

{Ni}^{2 +}

ion. From which orbital will nickel lose the electrons? (

Z

for

Ni = 28

)

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11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 12

What are the features of long form of periodic table?

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IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 13

What are disproportionation reactions? Explain with example.

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11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 14

Write anomalous behaviour of boron.

MEDIUM

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 14

Write uses of diborane.

MEDIUM

11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 14

Describe the shapes of

{BF}_{3}

and

[{BH}_{4}]^{-}

and assign the hybridisation of boron in these species.

MEDIUM

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IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 15

At

450 K, K_{p} = 2 \times 10^{10} / bar

for the following reaction at equilibrium:

2 {SO}_{2} (g) + O_{2} (g) ⇌ 2 {SO}_{3} (g)

What is the

K_{c}

at this temperature?

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11th ICSE

IMPORTANT

ALL IN ONE ISC Chemistry CLASS 11>Chapter 19 - Sample Question Paper 5>SAMPLE QUESTION PAPER 5>Q 15

For the reaction: $2 NO (g) + O_{2} (g) ⇌ 2 {NO}_{2} (g), ΔH = - 117 kJ$ .

(i) Predict the effect of increase in concentration of $NO$ on the equilibrium concentration of ${NO}_{2}$ .
(ii) Predict the effect of pressure decrease as a result of increased volume on equilibrium concentration of ${NO}_{2}$ .