Thursday, August 30, 2018
Tuesday, August 28, 2018
Engineering chemistry question
1.Hydrogenation is conversion of unsaturated acid groups into the saturated one by catalyst
a) Ti
b) Pb
c) Ni
d) Sn
Answer: c
Explanation: Hydrogenation is conversion of unsaturated acid groups into the saturated one by metal Nickel (Ni) catalyst.
2.Vegetable ghee is manufactured by
a) Saponification
b) Hydrogenation
c) Oxidation polymerisation
d) Reduction polymerisation
Answer: b
Explanation: Vegetable ghee is manufactured by hydrogenation. But due to the trans fatty acids dilemma, partial hydrogenation is no longer viable
3. Hydrogenolysis is a reaction which leads to the reduction products of
a) Aldehyde
b) Ketone
c) Alcohol
d) Ester
Answer: c
Explanation: Hydrogenolysis is a reaction which leads to the formation of glycerol and reduction products of alcohol.
Thursday, August 23, 2018
Biochemistry quiz
Q.1 Main function of insulin hormone is to
A. increase glycogen in liverB. decrease glycogen in liver
C. increase blood sugar
A. reducing agent
B. oxidizing agent
C. oxidizing and reducing agent both
D. none of the above
Answer: Option A
Q.3 A deficiency of thiamin produces the disease known as
A. beri-beri
B. scurvy
C. cataract
D. anemia
Answer: Option A
Friday, August 17, 2018
Basic quizzes
Q.1 An _______ bond is a bond in which electrons are transferred.
A.Covalent
Q.2 Gold is an example of a ______.
A.Molecule
B.Element
C.Atom
Q.3 The water molecule is _________, because there is an uneven distribution of electron within the molecule.
A.Uneven
B.Weird
C.Polar
A.Covalent
B.Ionic
C.Double
Answer:-Ionic
A.Molecule
B.Element
C.Atom
D.Covalent bond
Answer:-Element
Q.3 The water molecule is _________, because there is an uneven distribution of electron within the molecule.
A.Uneven
B.Weird
C.Polar
D.Strange
Answer:-Polar
Wednesday, August 15, 2018
Basic quiz
Suppose the elements X and Y combine to form two compounds XY2 and X3Y2. When 0.1 mole of XY2 weighs 10 g and 0.05 mole of X3Y2 weighs 9 g, the atomic weights of X and Y are [NEET 2016]
(A) 40, 30
(B) 60, 40
(C) 20, 30
(D) 30, 20
(A) 40, 30
(B) 60, 40
(C) 20, 30
(D) 30, 20
Tuesday, August 14, 2018
What Common Chemicals Shouldn't Be Mixed?
Some of the common chemicals found in your home shouldn't be mixed together. It's one thing to say "don't mix bleach with ammonia," but it's not always easy to know what products contain these two chemicals. Here are some household products you may have around the home that shouldn't be combined.
This mixture can result in toxic, potentially deadly fumes.
Vinegar is a type of acid.
Toxic chlorine vapor is produced. Don't mix chlorine bleach with any acid.
This is toxic. Potentially lethal vapors are produced. The main danger comes from chloramine vapors.
Don't mix different cleaners together. They may react violently, produce toxins, or become ineffective.
Acids and bases (alkalis) can react violently, presenting a splash hazard. Acids and bases are caustic and may cause chemical burns.
Don't mix disinfectants with 'quaternary ammonia' listed as an ingredient with a detergent. The effectiveness of the disinfectant may be neutralized.
Chlorine bleach is sometimes called “sodium hypochlorite” or “hypochlorite.” You will encounter it in chlorine bleach, automatic dishwashing detergents, chlorinated disinfectants and cleaners, chlorinated scouring powder, mildew removers, and toilet bowl cleaners.
Do not mix products together. Do not mix them with ammonia or vinegar.
Read the labels of products in your home and following instructions for proper use. Many containers will state the most common dangers from interaction with other products.
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