Download App

Metals and Non-Metals — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10ScienceMetals and Non-Metals1 Mark
MCQ
The noble gas having only two electrons in its valence shell is:
  • A
    Ar
  • B
    Ne
  • C
    He
  • D
    Kr
✓

Answer

  1. He

Explanation:

Atomic number of helium is 2. It contains 2 electrons in its atom.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "M.C.Q-[Che-1M]" from Metals and Non-Metals→Metals and Non-Metals — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

Which among the following statement(s) is (are) true? Exposure of silver chloride to sunlight for a long duration turns grey due to:
  1. The formation of silver by decomposition of silver chloride.
  2. Sublimation of silver chloride.
  3. Decomposition of chlorine gas from silver chloride.
  4. Oxidation of silver chloride.
→
Which one of the following statements is not correct?
→
The aqueous solution of sodium acetate is:
→
Identify the type of chemical reaction.
TiCl4​(l) + Mg(s) → Ti(s) + MgCl2​(s)
→
Which of the following cannot exhibit isomerism?
→
Consider the reaction,

$\text{KBr(aq)}\ +\ \text{AgNO}_3(\text{aq})\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ \ \ }\text{KNO}_3(\text{aq})\ +\ \text{AgBr(s)}$

This is an example of:

→
C4+ does not exist but Pb4+ exists although both belong to the same group. This is because

  1. Size of carbon is much smaller than Pb.
  2. Large amount of energy is needed in case of carbon.
  3. Of inert pair effect.
  4. Nucleus cannot hold such a large number of electrons.

The correct statement(s) is/ are.

    →
    The by product in soap industry is:
    →
    The correct increasing order of the atomic radii of the elements oxygen, fluorine and nitrogen is:
    1. O, F, N.
    2. N, F, O.
    3. O, N, F.
    4. F, O, N.
    →
    Two different atoms or groups of atoms are exchanged in:
    →