The correct option is [B]. Sodium hydroxide is called an alkali because it is a base that dissolves in water, forming a basic solution. Ferric hydroxide, though a base, is insoluble in water and not termed an alkali. class 10 science ...
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When the egg is not fertilized, the thickened uterine lining, which was prepared for implantation, breaks down and is shed along with blood and mucus through the vagina. This cyclic process is called menstruation in females. sample paper for class 10 ...
The hind-brain consists of the cerebellum, pons and medulla oblongata. Among these, the medulla oblongata controls vital involuntary actions such as blood pressure, heartbeat, breathing, salivation and other reflex activities essential for survival. sample paper for class 10 science board exam ...
Plugging a leak in a blood vessel is essential to prevent entry of pathogens and maintain blood circulation. The blood component responsible is platelets, which stick to the damaged site, release clotting factors and form a temporary plug, eventually leading ...
The student can see distant objects like the blackboard clearly but cannot read nearby objects like the textbook. This indicates difficulty in focusing on near objects, a condition known as long-sightedness (hypermetropia), where the near point of the eye has ...