General Q&A for Class 12 · Page 170
5,215 free answers in General for Class 12 students, across CBSE, ICSE and State boards.
Question & Answer
Questions
- GeneralClass 12All
What happens when urea is high?
High urea levels (uremia) can indicate kidney disease, dehydration, high protein intake, or other medical conditions. Symptoms may include fatigue, nausea, confusion, swelling, decreased urination, and in severe cases, can lead to serious complications requiring medical intervention.
- GeneralClass 12All
What are the symptoms of high urea levels?
Symptoms of elevated urea include fatigue, weakness, decreased appetite, nausea, vomiting, mental confusion, difficulty concentrating, muscle cramps, itchy skin, swelling in legs or feet, and changes in urination patterns. Seek medical attention if you experience these symptoms
- GeneralClass 12All
What is urea in blood called?
. Urea in blood is commonly referred to as Blood Urea Nitrogen (BUN) or serum urea. BUN tests measure the amount of nitrogen in your blood that comes from urea, serving as an important indicator of kidney and liver function.
- GeneralClass 12All
What foods are high in urea?
Foods don't contain urea directly, but high-protein foods increase urea production in your body. These include red meat, poultry, fish, eggs, dairy products, legumes, and nuts. When protein is metabolized, it produces ammonia, which the liver converts to urea.
- GeneralClass 12All
Does drinking water lower urea?
Yes, drinking adequate water can help lower blood urea levels, especially if dehydration is contributing to elevated levels. Proper hydration helps kidneys function efficiently and flush out urea. However, chronic high urea requires medical evaluation.
- GeneralClass 12All
What foods help repair kidneys?
Kidney-friendly foods include berries, fatty fish (omega-3s), leafy greens, apples, garlic, onions, cauliflower, and whole grains. These foods are low in sodium, phosphorus, and potassium while providing beneficial nutrients. Always consult a healthcare provider for personalized dietary advice.
- GeneralClass 12All
What is the best drink to flush your kidneys?
Water is the best drink for kidney health. Staying well-hydrated helps kidneys filter waste effectively. Cranberry juice and lemon water may offer additional benefits, but plain water remains the gold standard. Aim for 8-10 glasses daily unless otherwise advised by your doctor.
- GeneralClass 12All
What destroys the kidneys most?
Diabetes and high blood pressure are the leading causes of kidney damage. Other major contributors include chronic dehydration, excessive pain medication use, smoking, excessive alcohol consumption, high salt intake, and untreated urinary tract infections.
- GeneralClass 12All
What are the first signs of kidney damage?
Early signs include changes in urination (frequency, color, foaming), fatigue, swelling in ankles or feet, persistent puffiness around eyes, dry itchy skin, difficulty concentrating, poor appetite, muscle cramps, and elevated blood pressure. Many people show no symptoms in early stages.
- GeneralClass 12All
Is urine 100% water?
No, urine is approximately 95% water and 5% dissolved substances. These substances include urea, creatinine, uric acid, various salts (sodium, potassium, chloride), and trace amounts of hormones, enzymes, and other metabolic byproducts.
- GeneralClass 12All
Why does urine smell strong?
Strong-smelling urine typically results from dehydration (concentrated urine), certain foods (asparagus, coffee, garlic), medications, vitamins (especially B vitamins), or urinary tract infections. Ammonia smell develops when urine sits, as bacteria break down urea into ammonia.
- GeneralClass 12All
Is urine high in protein?
Normal urine contains very little protein. Healthy kidneys filter out waste while retaining proteins in the blood. Significant protein in urine (proteinuria) indicates kidney damage or disease and requires medical evaluation.
- GeneralClass 12All
What is the chemical name of acetic acid?
The chemical name of acetic acid is ethanoic acid. This systematic IUPAC name describes its structure as a two-carbon carboxylic acid. The compound consists of a methyl group (CH3) attached to a carboxyl group (COOH), making it the second member of the carboxylic acid family. In everyday contexts, it's commonly referred to as acetic acid, while ethanoic acid is the preferred term in formal chemistry nomenclatu
- GeneralClass 12All
What are the two types of urea?
This likely refers to blood urea nitrogen (BUN) measurement contexts: pre-renal (before kidney filtration, indicating dehydration or high protein intake) and renal (indicating actual kidney dysfunction). Alternatively, it may reference synthetic urea versus biological urea, though they're chemically identical.
- GeneralClass 12All
How do you write acetic acid formula?
The chemical formula for acetic acid can be written in several ways: CH3COOH (condensed structural formula), C2H4O2 (molecular formula), or HC2H3O2 (alternative representation). The most commonly used representation is CH3COOH, which clearly shows the molecule's structure with a methyl group (CH3) connected to a carboxyl group (COOH). This formula helps visualize how the acid donates a hydrogen ion (H+) from the COOH group when dissolved in water.
- GeneralClass 12All
Why is CH3COOH called glacial acetic acid?
CH3COOH is called glacial acetic acid when it's in its pure, concentrated form (typically 99-100% acetic acid). The term "glacial" comes from its unique property of forming ice-like crystals when cooled below 16.6°C (62°F). At this temperature, pure acetic acid solidifies into clear, ice-like crystals that resemble glacial ice, hence the distinctive name. This differentiates it from diluted forms like vinegar.
- GeneralClass 12All
Which acid freezes in cold weather?
Acetic acid freezes in cold weather, particularly in its concentrated glacial form. Pure acetic acid has a relatively high freezing point of 16.6°C (approximately 62°F), which means it can solidify during cool weather conditions. This unusual characteristic among acids is why concentrated acetic acid earned the name "glacial acetic acid" – it literally turns into ice-like crystals at temperatures that are still well above water's freezing point.
- GeneralClass 12All
What is a strong acid?
A strong acid is a substance that completely dissociates (breaks apart) into ions when dissolved in water, releasing all its hydrogen ions (H+). Common examples include hydrochloric acid (HCl), sulfuric acid (H2SO4), and nitric acid (HNO3). Strong acids have very low pH values (typically 0-1) and are highly corrosive. They conduct electricity well in solution because of the high concentration of ions, and they react vigorously with bases, metals, and other substances.
- GeneralClass 12All
What are the 7 types of acids?
The seven main types of acids include: (1) Mineral acids (like sulfuric, hydrochloric, and nitric acid), (2) Organic acids (like acetic, citric, and formic acid), (3) Strong acids (complete ionization in water), (4) Weak acids (partial ionization in water), (5) Monoprotic acids (donate one proton), (6) Polyprotic acids (donate multiple protons), and (7) Lewis acids (electron pair acceptors). These categories help classify acids based on their origin, strength, ionization behavior, and chemica
- GeneralClass 12All
Is urea an ammonia?
No, urea is not ammonia, though they are related. Urea is a waste product created when the liver converts toxic ammonia into a less harmful form. While ammonia (NH₃) is highly toxic, urea is much safer for the body to transport and eliminate through urin