Download App

Periodic Classification of Elements — Science STD 10 — Question

CBSE BoardEnglish MediumSTD 10SciencePeriodic Classification of Elements1 Mark
MCQ
The element which forms a basis oxide has the atomic number of:
  • A
    18.
  • B
    17.
  • C
    14.
  • ✓
    19.
✓

Answer

Correct option: D.
19.
Potassium (K) forms a basic oxide and has an atomic number of 19. The atomic numbers of 18, 17 and 14 correspond to acidic oxides.

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" from Periodic Classification of Elements→Periodic Classification of Elements — all question types→Science STD 10 question papers→CBSE Board STD 10 question papers→CBSE Board question paper generator→

Similar questions

The number of oxygen molecules used in the combustion of $1$ molecule of ethanol is?
→
A diverging lens is used in:
→
A concave mirror has a focal length of 25cm. At which of the following distance should a person hold his face from this concave mirror so that it may act as a shaving mirror? Give reason for your choice.
→
Stock and scion are involved in the artificial propagation method known as:
→
Complete the sentence. During a chemical reaction, atoms $...........$
→
Which of the following will have the most negative electron affinity and which one has the least?
→
Which one of the following statements is correct about the human circulatory system?
→
The cells in our blood which destroy disease - causing germs, are:
→
Calamine ore can be converted into zinc oxide by the process of:
→
The second trophic level of a food chain is occupied by herbivores that feed on plants or producers that are present in first trophic level.
Assertion : The second trophic level of a food chain operating in a grassland is mostly occupied by a carnivore.
Reason : Carnivores feed upon herbivores and are secondary consumers.
→