An element with atomic number twelve is likely to be
electrovalent with a velocity of 1
electrovalent with a valency of 2
covalent with a valency of 2
covalent with valency of 4
Correct answer is B
No explanation has been provided for this answer.
How much of magnesium is required to react with 260cm3 of 0.5 M HCl? [Mg = 24]
0.3g
1.5g
2.4g
3.0g
Correct answer is B
No explanation has been provided for this answer.
The number of atoms of chlorine present in 5.85g of NaCl is [Avogaro's Number = 6.02 x 1023]
6.02 x 1022
5.85 x 1023
6.02 x 1023
5.85 x 1024
Correct answer is A
The number of atoms of chloride present in 5.85g of NaCl is 5.85 x 6.0 x 1023
= 6.02 x 1022
HF + N2F2 → N2HF3
2HF + N2F2 → 2NHF2
2HF + N2F2 → N2H2F3
HF + 2N2F2 → N4HF2
Correct answer is B
No explanation has been provided for this answer.