1
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

What is the number of $$-$$CH$$_2$$ - groups present in dodecane?

A
12
B
10
C
15
D
13
2
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Which among the following statements is NOT true?

A
Compounds of unipositive ions of alkali metals are paramagnetic.
B
Alkali metals have low density.
C
All alkali metals are silvery white and soft.
D
Alkali metals are most electropositive elements.
3
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

An element with simple cubic close structure has edge length of unit cell $$3.86 ~\mathop A\limits^o$$. What is the radius of atom?

A
$$5.79 \times 10^{-8} \mathrm{~cm}$$
B
$$1.93 \times 10^{-8} \mathrm{~cm}$$
C
$$3.86 \times 10^{-8} \mathrm{~cm}$$
D
$$2.43 \times 10^{-8} \mathrm{~cm}$$
4
MHT CET 2021 21th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

In a first order reaction, concentration of reactant is reduced to (1/8)th of concentration in 23.03 minutes. What is half-life period of reaction?

A
25 min
B
7.7 min
C
15 min
D
30 min
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