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What happens when copper vessel is exposed to moist air for long time ?

Answer: Copper forms a green deposit on its surface when exposed to air which is usually a mixture of copper... View Article

Number of chambers in the heart of cockroach is (1) 5 (2) 9 (3) 13 (4) 16

Answer: (3) Cockroaches are pests inhabiting the unhygienic and damp places. They are dark brown in colour belonging to the... View Article

Cell wall was discovered by (1) Robert brown (2) Malpighi (3) Robert Hooke (4) Nageli

Answer: (3) Robert Hooke coined the term cell in 1665, after observing thin slices of cork under a microscope. Hence,... View Article

Largest muscle of human body is (1) Stapedium (2) Quadriceps (3) Gluteus maximus (4) Masseter

Answer: (3) Gluteus muscles are the large and heavy muscles in the human body and they are responsible for the... View Article

Write a note on economic importance of algae?

Answer: Alga is a term that includes a large group of eukaryotic, photosynthetic life forms, which are incredibly diverse. These... View Article

Which of the following is the most stable ecosystem? (1) Mountain (2) Desert (3) Forest (4) Ocean

Answer: (4)Ocean Explanation An ecosystem is defined as a community of lifeforms in concurrence with non-living components, interacting with each... View Article

Write IUPAC name of following compound.

Answer: 2- Amino- 4 – Hydroxybenzoic acid According to the Guidelines set by IUPAC, the priority list of the functional group... View Article

Calcium hydroxide reacts with carbon dioxide to form……………. (1) Calcium carbonate and water (2) Calcium carbonate and hydrogen (3) Calcium bicarbonate with water (4) None of the above

The correct answer is Calcium carbonate and water The reaction between calcium hydroxide and carbon dioxide An aqueous solution of... View Article

The colour of hydrogen gas is pink. (1) True (2) False

Answer: (2) The hydrogen gas is colourless, odourless and tasteless in nature. It is a combustible gas but not a... View Article

Gliding joint is present between the (1) Carpals (2) Humerus and glenoid cavity (3) Carpal and metacarpal of thumb (4) Knee

Answer: (1) Gliding joints or plane or planar joint are a common type of synovial joint. This joint permit two... View Article

Respiratory quotient of Tripalmitin is 0.73 and during respiration it releases 126 CO2 then how much O2 required for its respiration??

Answer: The actual ratio of the volume of carbon dioxide eliminated to the volume of oxygen consumed during the act... View Article

Ratio of WBC to RBC in human blood is (1) 1:100 (2) 1:200 (3) 500:1 (4) 1:600

Answer: (4) Red blood cells or Erythrocytes RBCs are the biconcave cells; also known as erythrocytes. RBCs contain the iron-rich... View Article

Megasporangium is equivalent to (1) Embryo sac (2) Fruit (3) Nucellus (4) Ovule

Answer: (4) Megasporangium is equivalent to the ovule. Megasporangium ovule is connected to the placenta with a stalk called funicle.... View Article

Haustorial root is present in (1) Zea mays (2) Cactus (3) Cuscuta (4) Monotropa

Answer: (3) The root is an underground part of the plant that absorbs water and minerals from the soil and... View Article

Intrafascicular cambium is situated in (1) Outside the vascular bundles (2) In medullary rays (3) Inside the vascular bundles (4) In between the vascular bundles

Answer: (3) In a dicotyledonous stem, the primary xylem and primary phloem are separated by cambium cells called intrafascicular cambium.... View Article

Aromatic compounds burn with sooty flame because (1) they have a relatively high percentage of hydrogen (2) they have a relatively high percentage of carbon (3) they have a ring structure (4) they are reluctant to react with atmospheric oxygen.

Answer: (2) The colour of the flame of combustion depends on the carbon compound being used. We will get a... View Article

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