Chemistry

When cathode rays are deflected into the electrode of an electrometer; the instrument becomes?

A. negatively charged B. positively charged C. neutral D. bipolar Correct Answer: Option A - negatively charged

4 years ago

From the below; which of the following pairs is like to be paramagnetic?

I. H = 1s1  II. N = 1s2 2s2 p3  III. O = 1s2 2s2 p4  IV. Zn = 1s2 2s2 2p6 3s2 3p6 4s2 3d10 A. I and II…

4 years ago

The noble gases owe their inactivity to?

A. Octet configuration B. Cyclic shape C. Hexagonal shape D. Obtuse configuration Correct Answer: Option A - Octet configuration

4 years ago

Neutral atoms of neon with atomic number 10 have the same number of electron as?

A. O²+ B. Ca²+ C. K+ D. Mg²+ Correct Answer: Option D - Mg²+

4 years ago

The IUPAC nomenclature of this compound below is?

A. 2-ethylpentane B. 3,4-dimethylhexane C. 2,3-dimethylhexane D. 2-ethylhexane Correct Answer: Option B - 2-ethylhexane

4 years ago

Alkanol + Alkanoic ↔ Ester + Water. The reverse reaction is known as?

A. Hydrolysis B. Saponification C. Hydration D. Fermentation Correct Answer: Option A - Hydrolysis

4 years ago

C2H5OH(aq) → Y. What is Y if the reaction takes place in conc. H2SO4 at 180°C?

A. CH4 B. C2H5COOH C. C2H4 D. CH3OCH3 Correct Answer: Option C - C2H4

4 years ago

3Cu + pHNO3 →3Cu(NO3)2 + 4H2O + xNO. The values of p and x respectively are?

A. 1 and 3 B. 2 and 3 C. 6 and 2 D. 8 and 2 Correct Answer: Option D…

4 years ago

The filter in the cigarette reduces the nicotine content by?

A. Burning B. Adsorption C. Evaporation D. Absorption Correct Answer: Option B - Adsorption

4 years ago

What is the percentage by mass of oxygen in Al2(SO4)3. 2H2O? [Al = 27, S = 32, H = 1, O = 16]

A. 14.29% B. 25.39% C. 50.79% D. 59.25% Correct Answer: Option D - 59.25% Explanation Al2(SO4)3. 2H2O 2 * 27…

4 years ago