science 12 grade

Question: Two electric bulbs have resistances in the ratio 1:2. If they are joined in series, the energy consumed in them are in the ratio _________. 1. 1:2 2. 2:1 3. 4:1 4. 1:1 Answer: ..

It represents how many times an atom is heavier than one atomic mass unit. It represents one-gram atom of an element. It represents how many atoms are present in one-gram atom (1 mole)For example, 12 grams of carbon has 6.023 x 10 23 atoms in it..

The above table gives a comparison between mixed cropping and inter-cropping. Another type of mixed cropping is border cropping. Here plants of a different species are planted along the border of the field. Example castor plant around a vegetable field. Another type of mixed cropping is the use ..

Example: 1 24 Mg12..

Question: There are ______________ pairs of spinal nerves. 1. 12 2. 31 3. 21 4. 8 Answer: ..

The atomic mass of an element is a relative quantity and is the mass of one atom of the element relative to the mass of one carbon-12 atom. Thus,Relative atomic mass (RAM) of an element is the number of times one atom of an element is heavier than 1/12 the mass of an atom of car..

Relative molecular mass or RMM is the molecular weight of an element or a compound. It is the number of times one molecule of the substance is heavier than 1/12 the mass of an atom of carbon ( 12 C..

Question: The number of moles in 5 grams of calcium is _________. 1. 0.125 mole 2. 5 mole 3. 1.25 mole 4. 12.5 moles Answer: ..

Crops of a particular species are more prone to a particular type of pest (weed, insects, diseases) infestation. When different types of crops are grown together chances of pest infestations are reduced or diluted. Due to increasing needs and reducing available land resources, there is a need for ..

Question: In 12 minutes a car whose speed is 35 km/h travels a distance of 1. 7 km 2. 3.5 km 3. 14 km 4. 28 km Answer: ..