A. magnetite B. haematite C. carbon(ii)oxide D. calcium trioxosilicate(iv) Correct Answer: Option B - haematite Explanation Cast iron + haematite…
A. milk B. kerosene C. soil D. smoke Correct Answer: Option D - smoke Explanation Solid in gas mixture: Smoke,…
A. 40J/K B. 400J/K C. 4J/K D. 0.4J/K Correct Answer: Option B = 400J/K
A. HC≡CCH2CH3 B. CH2≡CH2CH3 C. CH3C≡CCH3 D. CH3CH≡CHCH3 Correct Answer: Option D - CH3CH≡CHCH3 Explanation An alkene is produced when…
A. fog B. carbon(ii)oxide C. smog D. sulphur(iv)oxide Correct Answer: Option B - carbon(ii)oxide Explanation The most common source of…
A. CH3CH2COOH + KOH → CH3CH2COOK + H2O B. NH4OH + HCl → NH4 + H2O C. NaOH + HCl…
A. 31.6 B. 62.2 C. 32.7 D. 31.1 Correct Answer: Option D = 31.1 Explanation Charles' law is a special…
A. HCl B. NaH C. NH3 D. CH4 Correct Answer: Option B - NaH Explanation NaH is a saline (salt-like)…
A. 85cm3 B. 50cm3 C. 125cm3 D. 55cm3 Correct Answer: Option B - 50cm3 Explanation Since 2 mol H2 reacted…
A. C4H12O B. C3H9O C. C4H8O D. C3H8O Correct Answer: Option D - C3H8O Explanation C = 69/12; H =…