ECAT Pre Engineering MCQ Test With Answer for Chemistry Full Book

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ECAT Chemistry Important MCQ's

Sr.#	Question	Answer
1	When phenol is reduced in the presence of Zn dust, we get	A. Cyclohexene B. Cyclohexane C. Benzene D. Benzyne
2	Plastics are a pollution problem because many plastics:	A. Are made from petroleum B. Are very inflammable C. Burn to produce toxic fumes D. Decompose to produce toxic products
3	Hydrocarbans, SO2, CO, NH3, nitrogen oxides and compounds of fluorine are called	A. Primary pollutant B. Secondary pollutant C. Tertiary pollutant D. None of these
4	Spectrum of white light is continuous becuase	A. Colors separated by dark spaces B. There are no boundary lines between the colours C. The radiations are in infrared region D. The radiatins fall in ultraviolet region
5	Which of the following is not true for metalloids	A. They are borderline elements that exhibit both metallic and non-metallic properties to some extent B. They usually act as electron donors with non-metals and as electron acceptors with metals C. Some of these elements are boron, silicon and germanium D. They are good conductors of heat and electricity
6	Metal tend to lose electrons, becoming:	A. Metals B. Positively charged C. Negatively charged D. (a)And (c)
7	C6H12O6 is molecualr formula of:	A. Glucose B. Dextrose C. Fructose D. All of these
8	The hydridization in benzene is	A. sp3 B. sp2 C. sp4 D. dsp2
9	In a group IIA from top to bottom as the atomic number increases, there is regular decreases in	A. Ionic size B. Atomic size C. Ionization potential D. None of these
10		A. HF is stable and does not decompose even at 2000°C B. HF is stable and slowly decomposes at 2000°C C. HF is strong acid D. HF produces equal moles of hydrogen and fluorine