Which of the following statements is/are incorrect?
I Centrifugation method can be used to separate butter from cream.
II Coloured component of blue ink can be separated by evaporation.
III Chromatography can be used to detect drugs in blood.
IV Camphor can be separated from salt by crystallisation.
A II only
B II and III only
C IV only
D II and IV only
I think "a" is the answer.
Some children want to find out how overcrowding can affect the way plants grow. They put four pairs of plants, A, B, C and D, at the same place. Each pot is given the same amount of water each day. Which pair of plants should they use for their experiment?
The table below shows the properties of four substances K, L, M and N.
Which two substances would be most difficult to separate when mixed in water?
A K and L
B K and M
C L and M
D M and N
does anyone knows about ARDUINO
Match the columns and select the correct option.
|Column I||Column II|
|(A) Summer days are||1. Cold|
|(B) Winter days are||2. A windy day|
|(C) A strong wind blows on||3. Rainy|
|(D) Monsoon days are||4. Hot|
A a-1, b-2, c-3, d-4
B a-4, b-1, c-2, d-3
C a-4, b-2, c-1, d-3
D a-1, b-4, c-3, d-2