Q : Name an alkylbenzene widely used as a chemical intermediate in the production of phenol.
(A) Cumene
(B) Furan
(C) Styrene
(D) Toluene
Which of the following statements Is that not correct?
(A) Digestion is a chemical change.
(B) Photosynthesis is a chemical change.
(C) Respiration is a chemical change.
(D) Crystallisation is a chemical change.
"X" is a chemical present in our stomach and is necessary for digestion of food. When 'X' is secreted in excess, it causes health problems like indigestion. 'Y' is a chemical used to treat this condition. What could be 'X' and
(A) X is hydrochloric acid & Y is sodium carbonate.
(B) X is the milk of magnesia & Y is hydrochloric acid.
(C) X is hydrochloric acid & Y ismilk of magnesia.
(D) X is milk of magnesia & Y is ascorbic acid.
Hydrochloric Acid:
It creates the acidic conditions necessary for the action of the enzyme pepsin.
The function of hydrochloric acid is to kill bacteria and pathogens. When hydrochloric acid is secreted in excess, it causes health problems like indigestion.
Excessive secretion of stomach acid can also lead to the formation of peptic ulcers.
What do you call the type of drugs that mimic the natural messenger by switching on the receptor?
(A) Antidepressants
(B) Depressants
(C) Agonist
(D) Antagonists
Which of the following elements is NOT a component of baking soda?
(A) Hydrogen
(B) Calcium
(C) Sodium
(D) Oxygen
1. Which of the following calcium elements is not a component of baking soda?
2. The chemical formula of baking soda is NaHCO3, which is composed of four elements sodium, hydrogen, carbon and oxygen.
3. Baking soda is an alkaline substance used as a leavening agent in baking.
If a person is shot with a gun and all the bullets are not removed from his body, then due to which of the following poison will spread in his body?
(A) Mercury
(B) Lead
(C) Iron
(D) Arsenic
If a person is injured by shot of gun and all the bullets could not be removed it may cause poisoning by Lead As.
What is the standard 18 carat gold sold in the market?
(A) 82 parts gold and 18 parts other metals
(B) 18 parts gold and 82 parts other metals
(C) 18 parts gold and 6 parts other metals
(D) 9 parts gold and 15 parts other metals
Which one of the following elements has atomicity equal to one?
(A) Oxygen
(B) Argon
(C) Nitrogen
(D) Fluorine
Argon elements have atomicity equal to one.
Argon is a chemical element with the symbol Ar and atomic number 18.
It is in group 18 of the periodic table and is a noble gas.
Which particles are left behind when a hydrogen atom loses its electron?
(A) An alpha particle
(B) A neutron
(C) A proton
(D) A beta particle
The electron configuration of the atom with the atomic number '20' is?
(A) 2, 8, 10
(B) 2, 6, 8, 4
(C) 2, 8, 8, 2
(D) 2, 10, 8
The electronic configuration of the element with atomic number 20 is 2, 8, 8, 2.
The element with an atomic number of 20 is Calcium, Ca.
The electron configuration is found using the Aufbau principle: 1s2, 2s2, 2p6, 3s2, 3p6, 4s2
It belongs to the 2nd group and 4th period.
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