1
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

The complex $$\left[\mathrm{PtCl}_2(\mathrm{en})_2\right]^{2+}$$ ion shows

A
structural isomerism
B
geometrical isomerism only
C
optical isomerism only
D
geometrical and optical isomerism
2
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

$$15 \mathrm{~g}$$ of $$\mathrm{CaCO}_3$$ completely reacts with

A
$$6.95 \mathrm{~g}$$ of $$\mathrm{HCl}$$
B
10.95 g of $$\mathrm{HCl}$$
C
$$11.95 \mathrm{~g}$$ of $$\mathrm{HCl}$$
D
$$1.15 \mathrm{~g}$$ of $$\mathrm{HCl}$$
3
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

Bohr's radius of 2 nd orbit of $$\mathrm{Be}^{3+}$$ is equal to that of

A
4th orbit of hydrogen
B
2nd orbit of $$\mathrm{He}^{+}$$
C
$$3 \mathrm{rd}$$ obit of $$\mathrm{Li}^{2+}$$
D
1st orbit of hydrogen
4
COMEDK 2023 Morning Shift
MCQ (Single Correct Answer)
+1
-0

How much faster would a reaction proceed at $$25^{\circ} \mathrm{C}$$ than at $$0^{\circ} \mathrm{C}$$ if the activation energy is $$65 \mathrm{~kJ}$$?

A
4 times
B
6 times
C
12 times
D
11 times
EXAM MAP