1
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following electromagnetic radiations possesses lowest energy?

A
Radio waves
B
Microwaves
C
Infrared
D
Ultraviolet
2
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following is an example of branched chain polymer?

A
High density polythene
B
Low density polythene
C
Bakelite
D
Melamine
3
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

For the reaction,

$$\mathrm{CH}_3 \mathrm{Br}(a q)+\mathrm{OH}^{-}(a q) \longrightarrow \mathrm{CH}_3 \mathrm{OH}(a q)+\mathrm{Br}^{-}(a q),$$

The rate law is rate $$=k\left[\mathrm{CH}_3 \mathrm{Br}\right]\left[\mathrm{OH}^{-}\right]$$. What is change in rate of reaction if concentration of both reactants is doubled?

A
Rate increases by factor 2
B
Rate increases by factor 4
C
Rate remains same
D
Rate decreases by factor 2
4
MHT CET 2023 13th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

For the reaction, $$2 A+2 B \longrightarrow 2 C+D$$, the rate law is expressed as rate $$=k[A]^2[B]$$. Calculate the rate constant if rate of reaction is $$0.24 \mathrm{~mol} \mathrm{~dm}^{-3} \mathrm{~s}^{-1}$$.

[[$$A$$]$$=0.5 \mathrm{M}$$ and $$[B]=0.2 \mathrm{M}$$]

A
$$4.8 \mathrm{~mol}^{-2} \mathrm{~dm}^6 \mathrm{~s}^{-1}$$
B
$$9.6 \mathrm{~mol}^{-2} \mathrm{~dm}^6 \mathrm{~s}^{-1}$$
C
$$12.1 \mathrm{~mol}^{-2} \mathrm{~dm}^6 \mathrm{~s}^{-1}$$
D
$$14.4 \mathrm{~mol}^{-2} \mathrm{~dm}^6 \mathrm{~s}^{-1}$$
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