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Question:- The hardest form of carbon is A. coke B. graphite C. diamond D. charcoal
Answer:- Option C
Question:- The most important ore of aluminium is A. bauxite B. magnetite C. haematite D. monazite
Answer:- Option A
Question:- The organic reaction represented by equation CH3 - CH = O + H2NOH gives CH3 - CH - NH + H2O is an example of A. an addition reaction B. a condensation reaction C. an oxidation reaction D. an elimination reaction
Answer:- Option B
Question:- The number of electrons presents in H+ is A. zero B. one C. two D. three
Answer:- Option A
Question:- Is H+ a hydrogen ion?
Answer:- H+ is a hydrogen ion, and it is an ion because it LOST an electron. Electrons are negatively charged. When an atom gains electrons it will have NEGATIVE charges. So it has zero electron.
Question:- The hottest part of the gas flame is known as A. luminous zone B. dark zone C. blue zone D. non-luminous zone
Answer:- Option D
Question:- The human body is made up of several chemical elements; the element present in the highest proportion (65%) in the body is A. carbon B. hydrogen C. oxygen D. nitrogen
Answer:- Option C
Question:- The isomerism which exists between CH3CHCI2 and CH2CI. CH2CI is A. chain isomerism B. functional group isomerism C. positional isomerism D. metamerism
Answer:- Option C
Question:- The half life period of an isotope is 2 hours. After 6 hours what fraction of the initial quantity of the isotope will be left behind? A. 1/6 B. 1/3 C. 1/8 D. 1/4
Answer:- Option C
Question:- The number of waves made by an electron moving in an orbit having maximum magnetic quantum number is +3 A. 4 B. 5 C. 2 D. zero
Answer:- Option A
Question:- The number of atoms present in 21.6 gram of silver (atomic weight = 108) are same as the molecules in A. 1.8 gram of H2O B. 12 moles of KMnO4 C. 0.6N H2SO4 D. 4.6 gram of C2H5OH
Answer:- Option B
Question:- The National Chemical Laboratory is situated in A. New Delhi B. Bangalore C. Pune D. Patna
Answer:- Option C
Question:- Equal masses of oxygen, hydrogen and methane are kept under identical conditions. The ratio of the volumes of gases will be A. 2 : 16 : 2 B. 2 : 16 : 1 C. 1 : 16 : 2 D. 1 : 1 : 1
Answer:- Option C
Question:- The mass number of an atom is equal to A. the number of protons B. the number of protons and electrons C. the number of nucleons D. the number of neutrons
Answer:- Option C