1
NEET 2024 (Re-Examination)
MCQ (Single Correct Answer)
+4
-1

On complete combustion, 0.3 g of an organic compound gave 0.2 g of CO$$_2$$ and 0.1 g of H$$_2$$O. The percentage composition of carbon and hydrogen in the compound, respectively is:

A
4.07% and 15.02%
B
18.18% and 3.70%
C
15.02% and 4.07%
D
3.70% and 18.18%
2
NEET 2024
MCQ (Single Correct Answer)
+4
-1

1 gram of sodium hydroxide was treated with $$25 \mathrm{~mL}$$ of $$0.75 \mathrm{~M} \mathrm{~HCl}$$ solution, the mass of sodium hydroxide left unreacted is equal to

A
750 mg
B
250 mg
C
Zero mg
D
200 mg
3
NEET 2024
MCQ (Single Correct Answer)
+4
-1

The highest number of helium atoms is in

A
$$4 \mathrm{~mol}$$ of helium
B
$$\mathrm{4 u}$$ of helium
C
$$4 \mathrm{~g}$$ of helium
D
$$2.271098 \mathrm{~L}$$ of helium at STP
4
NEET 2024
MCQ (Single Correct Answer)
+4
-1

A compound X contains $$32 \%$$ of A, $$20 \%$$ of B and remaining percentage of C. Then, the empirical formula of $$\mathrm{X}$$ is :

(Given atomic masses of A=64 ; B=40 ; C=32 u)

A
$$\mathrm{A}_2 \mathrm{BC}_2$$
B
$$\mathrm{ABC}_3$$
C
$$\mathrm{AB}_2 \mathrm{C}_2$$
D
$$\mathrm{ABC}_4$$
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