Which of the following compounds of tin is a strong reducing agent?
A. SnCI2 B. SnCI4 C. SnO2 D. SnH4 E. Sn(OH)2 Correct Answer: Option D – SnH4
When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is?
A. Y2O B. YNO2 C. Y2O3 D. Y (NO2)2 E. YO2 Correct Answer: Option B – YNO2
Examples of polymers include the following except?
A. starch B. nylon C. wool D. perspex E. glass Correct Answer: Option E – glass
Which of the following will not affect the degree of hardness in a sample of temporarily hard water?
A. Addition of washing soda B. Adding of soap C. Treatment with carbon exchange resin D. Filtration E. Distillation Correct Answer: Option D – FiltrationThe component of air that removed when air is bubbled into alkaline pyrogallol solution is?
A. carbon(lV) oxide B. oxygen C. water vapour D. nitrogen E. helium Correct Answer: Option B – oxygenProducts
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