What fraction of a day is 8 hours?
Answer: We know that 1 day is equal to 24 hours 1 hour = 1/24 day So 8 hours =... View Article
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The chemical name of vitamin D is (1) Reboflavin (2) Ascrobic acid (3) Niacin (4) Calciferol
Answer: (4) The general name for a series of steroid-like compounds, including vitamin D2, ergocalciferol and vitamin D3, cholecalciferol, is... View Article
tan A+ tan (60+A) -tan (60-A) is equal to (1) 3 tan 3A (2) tan 3A (3) cot 3A (4) sin 3A
Answer: (1) Let us calculate tan (60 + A) and tan (60 – A). \(\begin{array}{l}tan \left ( 60 + A... View Article
Miracidium is the larval stage of (1) Tapeworm (2) Roundworm (3) Pinworm (4) Liver Fluke
Answer: (4) Miracidium Initial larval stage of trematode worms or flukes. Flukes hatches from eggs excreted in the primary host’s... View Article
Saheli is an oral contraceptive pill that has very high contraceptive value with little side effectsIt is because (1) It is taken once in a week (2) It contains synthetic progesterone (3) It contains centchroman (4) It decreases risk of cancer
Answer: (3) Saheli established at Lucknow at Central Drug Research Institute. For a female, it’s a new oral contraceptive pill.... View Article
Who coined the term ecology?
Answer: Ernst Haeckel coined ecology. The ecology was coined in 1866 by Ernst Haeckel, a zoologist. Although the field is... View Article
What is the angle of dip at magnetic poles and magnetic equator?
Answer: The dip ranges from South Magnetic Pole is (-90) degrees and in the North Magnetic Pole (+ 90) degrees.... View Article
Why are metals good conductors of electricity whereas glass is a bad conductor of electricity? Give reason.
Answer: The electrons in the metal are loosely bound while the electrons in the glass are tightly bound together. Glass has... View Article
List four advantages of vegetative propagation.
Answer: Vegetative propagation is an asexual method of plant reproduction that occurs in its leaves, roots and stem. This can... View Article
The fuel used as aviation fuel in jet aeroplanes is a special grade of (1) Disel (2) Kerosene (3) Petrol (4) Fuel oil
Answer: Kerosene has the highest calorific value of all and is thus used in a jet aeroplane as an aviation... View Article
Use Euclid’s division lemma to show that the cube of any positive integer is of the form 9m,9m+1 or 9m+8
Answer: Let us consider a and b where a be any positive number and b is equal to 3. According... View Article
The water holding capacity is the highest in
a) sandy soil b) clayey soil c) loamy soil d) mixture of sand and loam Answer: b) Clayey soil Explanation: Clayey... View Article
Describe the Mass Flow Hypothesis for Translocation of Organic Solutes (Food) In Plants
Answer: Munch’s Mass Flow Hypothesis is the theory that describes the movement of food materials from the concentration areas to... View Article
1g of Mg atoms in the vapour phase absorbs 50.0kJ of energy. Find the composition of Mg2+. formed as a result of absorption of energy.IE1 and IE2 for Mg are 740 and 1450kJ mol−1 respectively.
Answer: A mole of Mg = 1/24 These many moles of Mg is converted to Mg+ and Mg2+. The energy... View Article
What are milch animals?
Answer: The animal that produce milk are known as milch animals. Many domestic animals provide milk. Examples Milk-producing livestock, are... View Article
The packing efficiency of the face centered cubic (fcc) , body centered cubic (bcc) and simple primitive cubic (pc) lattices follows the order: (1) fcc > bcc > pc (2) bcc > fcc > pc (3) pc < bcc < fcc (4) bcc < pc < fcc
The correct answer is (1) fcc > bcc > pc The packing quality is the proportion of the atoms directly... View Article
A fuse wire should have (1) High resistance (2) Low melting point (3) Both (1) and (2) (4) none of thr above
Answer: (3) A fuse wire should be highly resistant and have a low melting point, toprevent the current from passing... View Article
The SI unit of inductance, the henry can be written as (1) Weber/ ampere (2) Volt second/ampere (3) Joule/ ampere2 (4) All the above
Answer: (3) Joule/ ampere2 The SI unit of inductance is Henry abbreviated as H. It is defined as the measure of... View Article
Which is the lightest gas? (1) N2 (2) He (3) O2 (4) H2
Answer: Hydrogen and helium are the two lightest gasses. While helium is twice as heavy as diatomic hydrogen both are... View Article
Structure of ICl2− (1) Trigonal (2) Octahedral (3) Square planar (4) Distorted trigonal pyramidal
Answer: (4) The ICl2−has sp3d-hybridized structure having trigonal bipyramidal shape but due to the presence of lone pair of electron... View Article
