1
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Find empirical formula of the compound if $$M=68 \%$$ (atomic mass $$=34$$ ) and remaining $$32 \%$$ oxygen.

A
$$\mathrm{MO}$$
B
$$\mathrm{M}_2 \mathrm{O}$$
C
$$\mathrm{MO}_2$$
D
$$\mathrm{M}_2 \mathrm{O}_3$$
2
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

A bulb is emitted electromagnetic radiation of $$660 \mathrm{~nm}$$ wavelength. The total energy of radiation is $$3 \times 10^{-18} \mathrm{~J}$$. The number of emitted photon will be

$$\left(h=6.6 \times 10^{-34}\right) \mathrm{J} \times \mathrm{s}, c=3 \times 10^8 \mathrm{~m} / \mathrm{s}$$

A
1
B
10
C
100
D
1000
3
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Yellow colour of chlorine water fades because of

A
form $$\mathrm{HCl}$$ and $$\mathrm{HOCl}$$
B
chlorine gas escapes
C
$$\mathrm{ClO}_2+\mathrm{H}_2$$
D
$$\mathrm{Cl}_2 \mathrm{O}$$
4
AIIMS 2019
MCQ (Single Correct Answer)
+1
-0.33

Which have melting point below $$500^{\circ} \mathrm{C}$$ ?

A
Ag, Cu
B
Zn, Cd
C
Cd, Cu
D
Ag, Zn
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