Chemical Reactions and Equations — Science STD 10 — Question

State whether the following statements are true or false:
The value of systolic pressure is always lower than that of diastolic pressure.

The directional growth of a plant part in response to touch of an object is known as thigmotropism. [True/ False]

State whether the following statements are true or false:
According to Mendeleev’s periodic law, the properties of elements are a periodic function of their atomic numbers.

State whether the following statements are true or false:

1. The scattering away of red light makes the sky appear blue during the day time.
2. The scattering away of blue light makes the sun appear red at sunset.

State whether the following statement is true or false:
A chemical equation can be balanced easily by altering the formula of a reactant or product.

Equal distribution of genes occurs because these gases are located on pairs of homologous chromosomes. [True/ False]

When resistors are connected in series, the sum of the currents in them is the current drawn from cell. [True/ False]

All non-metallic oxides dissolve in water to form acids. [True/ False]

State whether the following statement is true or false:
A diverging mirror is used as a rear-view mirror.

Secondary consumers and tertiary consumers, both are carnivores.