You were given two pieces of chalk. To prove the activity on breaking of food material one of the following is used.
A) Sulphuric acid
B) Acetaldehyde
C) Formic acid
D) Vinegar
1 Answers
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Activity such as decipher codes or passwords and breaking security systems for illegal reasons is called __________
Correct Answer is Cracking
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Activity such as __________ or __________ and breaking security systems for illegal reasons is called cracking.
(D) Decipher Codes, (E) Passwords
2 Answers 8 views
Activity such as __________ codes or __________ and breaking __________ systems for illegal reasons is called cracking.
(B) Decipher, (D) Passwords, (E) Security
2 Answers 1 views
(i) Chalk contains calcium, carbon and oxygen in the ratio 10:3:12. Find the percentage of carbon in chalk. (ii) If in a stick of chalk, carbon is 3g,
Correct Answer - (i) 12% (ii) 25g
2 Answers 1 views
Two pieces of wire A and B of the same material have their lengths in the ratio 1:2, and their diameters are in the ratio 2:1.
Correct option is: (C) 1 : 8
2 Answers 1 views
A large magnet is broken into two pieces so that their lengths are in the ratio 2:1. The pole strengths of the two pieces will have the ratio
Correct option is: (A) 2 : 1
2 Answers 1 views
A Shell Initially at rest explodes into two pieces of equal mass the two pieces will
2) move with the same velocity in opposite directions The two masses are equal, so to conserve linear momentum which is zero, they should move in the opposite directions with equal...
2 Answers 1 views
Find the correct statement regarding the experiment done for proving “crushing of chalk piece due to vinegar in ‘ beaker”.
B) Food is digested very fast only after breaking into pieces
2 Answers 1 views
Assertion : All chemicals added to food items are called food preservatives. Reason : All these chemicals increase the nutritive value of the food.
(iii) Both assertion and reason are wrong statement.
2 Answers 1 views
In Hydra, waste material of food digestion and nitrogenous waste material are removed from
Correct Answer - C Mouth and body wall respectively
2 Answers 1 views