Sindh Chemistry 2019 — Solved Past Paper with Answers

Q1. This one is condensation polymer:

• A. PVC
• B. PVA
• C. Polyethylene
• D. Terylene✓

Explanation: Explanation will be added soon

Q2. The number of isomers of pentane is:

• A. 3
• B. 5✓
• C. 7
• D. 9

Explanation: Explanation will be added soon

Q3. Propanone and propanal are:

• A. metamers
• B. Chain isomers
• C. Functional group isomers✓
• D. position isomers

Explanation: Explanation will be added soon

Q4. This is not a nucleophile:

• A. OH-
• B. NH3
• C. BF3✓
• D. CN-

Explanation: Explanation will be added soon

Q5. Reduction of Aldehyde giyes:

• A. Carboxylic acid
• B. Alcohol✓
• C. Ester
• D. Ether

Explanation: Explanation will be added soon

Q6. Hybridization in the carbon atom of carbonyl group is of this type:

• A. sp
• B. sp2✓
• C. sp3
• D. dsp2

Explanation: Explanation will be added soon

Q7. This imparts green colour to glass:

• A. CoO
• B. MnO2
• C. CuO
• D. Cr203✓

Explanation: Explanation will be added soon

Q8. Rickets is caused by the deficiency of Vitamin:

• A. A
• B. B
• C. C
• D. D✓

Explanation: Explanation will be added soon

Q9. Milk sugar is also called:

• A. Glucose
• B. Fructose
• C. Lactose✓
• D. Sucrose

Explanation: Explanation will be added soon

Q10. Octet rule is fulfi by all noble gases except

• A. Ne
• B. Ar
• C. He✓
• D. Xe

Explanation: Explanation will be added soon

Q11. The element with atomic number 33 blongs to:

• A. s-block
• B. p-block✓
• C. d-block
• D. f-block

Explanation: Explanation will be added soon

Q12. Hydration of VA group are:

• A. basic✓
• B. acidic
• C. amphoteric
• D. neutral

Explanation: Explanation will be added soon

Q13. The nucleus of Tritium consists of:

• A. one proton only
• B. one proton & one neutron
• C. two protons & two neutrons
• D. one proton & two neutrons✓

Explanation: Explanation will be added soon

Q14. This metal forms superoxide:

• A. Li
• B. Be
• C. K✓
• D. Mg

Explanation: Explanation will be added soon

Q15. Antidote of H2S poisoning is very dilute

• A. Nitrogen
• B. Oxygen
• C. Chlorine✓
• D. Helium

Explanation: Explanation will be added soon

Q16. The product of heating Boric acid to 140°C is:

• A. Orthoboric Acid
• B. Metaboric acid
• C. Pyroboric Acid✓
• D. Boric oxide

Explanation: Explanation will be added soon

Q17. Galvanized iron means iron coated with:

• A. Zn✓
• B. Cu
• C. Al
• D. Sn

Explanation: Explanation will be added soon