Refer to the given flow chart and select the correct option regarding P, Q and R.
AP could be tuberculosis or leprosy, caused by virus.
BQ could be cholera or typhoid, caused by bacteria.
CR could be malaria or sleeping sickness, caused by Anopheles mosquito.
DP, Q and R are non-infectious but contagious diseases.
c and b both are correct
The different steps of vermicomposting are given below randomly.
(i) Spread sand on the floor of the pit
(ii) Place red worms in the pit
(iii) Cover with a grass
(iv) Sprinkle water to keep it moist
(v) Dig a pit in a suitable place
(vi) Add vegetable peels and fruit waste in the pit
Which of the following represents the correct sequence of steps?
A (v) → (vi) → (i) → (iii) → (ii) → (iv)
B (v) → (i) → (vi) → (iii) → (iv) → (ii)
C (v) → (i) → (iii) → (vi) → (ii) → (iv)
D (v) → (ii) → (iii) → (iv) → (i) → (vi)
Ravi set up an experiment as shown in the given figure.The figure shows five identical balls being suspended on a rod by strings of different lengths. Ravi then cut all five strings at the same time and the balls were
allowed to fall freely to the ground.
Which of these statements holds true for this experiment?
ABall ‘b’ had the greatest impact on the ground.
BBall ‘a’ had less gravitational potential energy than ball ‘c’ at the start.
CBall ‘d’ had the most gravitational potential energy at the start.
DBalls ‘a’ and ‘e’ had different amounts of gravitational potential energy at the start due to their different positions along the rod.
Which of the following statements are true about acid rain ?
(i) Acid rain has harmful effects on the living beings.
(ii) Acid rain mainly comprises of H2SO4 and HNO3.
(iii) Greenhouse gases are mainly responsible for causing acid rain.
(iv) Acid rain causes damage to buildings.
A (i) and (ii) only
B (i) and (iii) only
C (i), (iii) and (iv) only
D (i), (ii) and (iv) only
but here option C is also true ,so there have the option as 'all of these'.
Kirti kept a metal spoon in a glass jar filled with pickle for a few days. She observed that there were holes in the spoon. What could be the possible reason for this?
A Oil present in pickle dissolves the metal.
B Oil present in pickle liberates a gas in which metal gets dissolved.
C Metal reacts with acid present in pickle to form salt hence, metal gets dissolved.
D The glass reacts with metal to give acid which dissolves the metal.
i didnt get this . answer says acid reacts with metal to form salt but acid reacts with metal to form hydrogen can you help me ?
Who among the following made the wrong statements?
A Divya and Nandini
B Richa and Nandini
C Divya, Richa and Nandini
D None of these
answer is option c because CHIPKO movement was started in 1927
Match the columns and select the correct option from the codes given below.
A a - iii, b - ii, c - iv, d - i
B a - ii, b - iv, c - i, d - iii
C a - iv, b - ii, c - iii, d - i
D a - i, b - ii, c - iii, d - iv.
please correct the question Wind and Mansoon both have the same serial number