1
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following carbocation is most reactive?

A
$$\mathrm{CH}_3^{+}$$
B
$$\mathrm{CH}_3-\mathrm{CH}_2^{+}$$
C
$$\left(\mathrm{CH}_3\right)_2 \mathrm{CH}^{+}$$
D
$$\left(\mathrm{CH}_3\right)_3 \mathrm{C}^{+}$$
2
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

Which of the following metals is refined by vapour phase refining in Mond process?

A
Zn
B
Zr
C
Si
D
Ni
3
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

What is correct order of $$C-X$$ bond strength in $$\mathrm{CH}_3-X$$ ?

A
$$\mathrm{CH}_3 \mathrm{F}>\mathrm{CH}_3 \mathrm{Cl}>\mathrm{CH}_3 \mathrm{Br}>\mathrm{CH}_3 \mathrm{I}$$
B
$$\mathrm{CH}_3 \mathrm{Cl}>\mathrm{CH}_3 \mathrm{Br}>\mathrm{CH}_3 \mathrm{l}>\mathrm{CH}_3 \mathrm{~F}$$
C
$$\mathrm{CH}_3 \mathrm{I}>\mathrm{CH}_3 \mathrm{Br}>\mathrm{CH}_3 \mathrm{Cl}>\mathrm{CH}_3 \mathrm{~F}$$
D
$$\mathrm{CH}_3 \mathrm{F}>\mathrm{CH}_3 \mathrm{Br}>\mathrm{CH}_3 \mathrm{Cl}>\mathrm{CH}_3 \mathrm{I}$$
4
MHT CET 2020 16th October Evening Shift
MCQ (Single Correct Answer)
+1
-0

An element crystallises in a bcc lattice with cell edge of 500 pm. The density of the element is $$7.5 \mathrm{~g} \mathrm{~cm}^{-3}$$. How many atoms are present in 300 g of metal?

A
$$6.4 \times 10^{23}$$ atoms
B
$$12.8 \times 10^{23}$$ atoms
C
$$3.2 \times 10^{23}$$ atoms
D
$$1.6 \times 10^{23}$$ atoms
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