Thursday, August 30, 2018

Bsic quizz

Q.1 Positive ion formation is
     A.Exothermic
     B.Endothermic
     C.no energy
     D.neutral


Answer:-B


Q.2 Modern method for separation of isotopes is
     A.laser separation
     B.chromatography
     C.ionization
     D.X-ray
Answer:-A

Q.3 Formation of negative ion is
     A.Exothermic
     B.Endothermic
     C.energy less
     D.neutral
Answer:-A

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 liver
      B. decrease glycogen in liver
      C. increase blood sugar
      D. decrease blood sugar


Answer:-Option D

Q.2 Ascorbic acid acts as an
      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
      B.Ionic 
      C.Double



Answer:-Ionic

Q.2 Gold is an example of a ______.
      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

Tuesday, August 14, 2018

Basic chemistry quizzes

Q.1  Minerals are
       A Liquids
       B.Inorganic solids
       C.Gases
       D.All of these


Answer:- B

Q.2 Artificial Silk is also called ?
      A.Dacron
      B.Fiber Glass
      C.Nylon
      D.Rayon

Answer:D

Q.3 The natural rubber is a polymer of
       A.Ethylene
       B.Acetylene
       C.Isoprin
       D.Vinyl chloride

Answer:-C

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.
 
Bleach With Acid Toilet Bowl Cleaners
This mixture can result in toxic, potentially deadly fumes.

Bleach With Vinegar
Vinegar is a type of acid.
Toxic chlorine vapor is produced. Don't mix chlorine bleach with any acid.

Bleach With Ammonia
This is toxic. Potentially lethal vapors are produced. The main danger comes from chloramine vapors.

Different Brands of One Type of Product
Don't mix different cleaners together. They may react violently, produce toxins, or become ineffective.

Highly Alkaline Products With Highly Acidic Products
Acids and bases (alkalis) can react violently, presenting a splash hazard. Acids and bases are caustic and may cause chemical burns.

Certain Disinfectants With Detergents
Don't mix disinfectants with 'quaternary ammonia' listed as an ingredient with a detergent. The effectiveness of the disinfectant may be neutralized.

Bottom Line
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.