Question

Multiple choice questions:
1)Pb is the symbol of
(a) Copper (b) Phosphorus (c) Lead

2)Helium,Neon,Argon are
(a)Metals (b) Noble gases (c) Metalloids

3)Which of the following metal burns with dazzling while flame
(a) Sodium (b) Potassium (c) Magnesium

4)Which of the following displaces Hydrogen on reaction with dilute mineral acids
(a) Silver (b) Sodium (c) Sulphur
I need answers for these...Plz quick.... ​

Answer 1

Answer:

helium argon

Explanation:

The present ages of Dishan and Ishika are in the ratio 6: 5. Four years ago, the ratio of their ages was 4:3. Find their present ages.