Given below are a few chemical processes
A. Rusting of iron
B. Burning of a candle
C. Respiration
D. Photosynthesis'

Which two of these represent slow combustion? 

• D and A

• A and C

• B and C

• B and D

The smallest of living organisms with cell wall are

• yeast

• cyanobacteria

• algae

• bacteria

When CNG or LPG undergoes complete combustion, the products formed are

• CO₂ and H₂O

• CO₂, SO₂, and H₂O

• CO₂ only

• CO₂, CO, and H₂O

Assessment in Science should focus more on testing the ability of students to

• answer open-ended questions

• be sufficiently equipped for higher learning

• state the facts and principles of Science correctly

• apply the understanding of concepts to unfamiliar situations in everyday life

The SI unit of calorific value is

• J/kg

• Kilocalorie/kg

• kJ/kg

• Calorie

6.

The process of converting sugars into alcohols is known as

• pasteurisation

• sterilisation

• homogenisation

• fermentation

One of the main limitations of the Project method of teaching Science is that

• knowledge is not acquired in a sequential manner

• integration of concept in various subjects can be achieved

• the students have to perform excessive mental and physical work

• it is a psychological method

Summative Assessment in Science should mainly focus on 

• assessing observation skills

• diagnosing the areas of learning difficulties of students

• testing of mainly the practical skills

• testing important theoretical concepts

The dietary fibres are

• made up of collagen fibres

• made up of proteins

• also called roughage

• made up of cellulose and proteins

If the frequency of vibrations of a body is decreased and its amplitude is increased, then

• pitch increases but loudness decreases

• pitch decreases but loudness increases

• both pitch and loudness of sound produced will increase.

• both pitch and loudness of sound produced will decrease